▎ 摘　　要

NOVELTY - An alkali metal composite negative electrode comprises support layer, and an alkali metal supported on the surface and the void of the support layer. The support layer is chosen from one or more of carbon cloth, three dimensional porous graphene, nickel mesh, copper mesh and aluminum mesh. The alkali metal is chosen from one of lithium, sodium, and potassium. USE - Alkali metal composite negative electrode for preparing solid alkali metal battery (claimed). ADVANTAGE - The alkali metal composite anode can effectively inhibit the formation of alkali metal dendrites and the interfacial reaction between the alkali metal and the electrolyte. The prepared solid alkali metal battery has excellent safety performance and comprehensive performance. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) preparation of alkali metal composite negative electrode; and (2) use of alkali metal composite negative electrode for preparing a solid alkali metal battery, which involves using alkali metal composite negative electrode, monomer containing an unsaturated bond, ceramic electrolyte, lithium salt, functional additive, organic solvent, positive electrode, separator, and initiator.